Q. A can do a job in 40 days. B joins him and they finish it in 15 days. In how many days can B alone complete it?
✅ Correct Answer: (B)
24 days
Explanation: Let B = x days. 1/40 + 1/x = 1/15 → x = 24 days.
Explanation by: Yami Thakur
Let B = x days. 1/40 + 1/x = 1/15 → x = 24 days.